feat: add gh actions workflows for building and deploying android and ios to Firebase and TestFlight

[gkartalis]

This PR resolves PHIRE-1995

Description

removes:

• build-deploy-android-firebase
• build-deploy-android-playstore
• build-deploy-ios-firebase
• build-deploy-ios-testflight

and moves them to github actions.

Before	After

PR Checklist

• I have tested my changes on the following platforms:
  • Android.
  • iOS.
• I hid my changes behind a feature flag, or they don't need one.
• I have included screenshots or videos at least on Android, or I have not changed the UI.
• I have added tests, or my changes don't require any.
• I added an app state migration, or my changes do not require one.
• I have documented any follow-up work that this PR will require, or it does not require any.
• I have added a changelog entry below, or my changes do not require one.

To the reviewers 👀

• I would like at least one of the reviewers to run this PR on the simulator or device.

Changelog updates

Changelog updates

Cross-platform user-facing changes

iOS user-facing changes

Android user-facing changes

Dev changes

• move beta builds to gh actions

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[ArtsyOpenSource]

This PR contains the following changes:

• Dev changes (move beta builds to gh actions - gkartalis)

Generated by 🚫 dangerJS against 388bf99

[brainbicycle]

for later: common steps for both iOS and android can probably be separated out into a file and reused in both jobs

[brainbicycle]

some minor comments but looks great! thank you!

I think before and after photos might be switched

[gkartalis]

we can ignore the failing test - it was fixed in main

[MounirDhahri]

Impressive work